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Orders > Correspondence Manual > Appendix B


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  1. Spell out the first reference to any acronym used, and place the acronym in parentheses after it (e.g., Federal Highway Administration (FHWA))

  2. On internal FHWA memorandums when the acronym is recognized by everyone, it does not have to be spelled out. This does not apply to the memorandum to the Secretary.

  3. A list of common FHWA acronyms and other Federal Government acronyms is included.

  4. A list of preferred State highway agency acronyms is also included. These preferred acronyms are to be used in FHWA correspondence.


AA Associate Administrator
AAA American Automobile Association or Appraisers Association of America
AADT Annual Average Daily Traffic
AAMVA American Association of Motor Vehicle Administrators
AAR Association of American Railroads
AARP American Association of Retired Persons
AASHTO American Association of State Highway and Transportation Officials
AAST Atlanta Administrative Services Team
ABA American Bus Association
ACEC American Consulting Engineers Council
ACHP Advisory Council on Historical Preservation
ACI American Concrete Institute
ACIR Advisory Commission on Intergovernmental Affairs
ACPA American Concrete Pavement Association or American Concrete Pipe Association
ADA Americans with Disabilities Act
ADA Assistant Division Administrator
ADH Appalachian Development Highways
ADHS Appalachian Development Highway System
AGC Association of General Contractors
AHATF American Highway Association Trust Fund
AHUA American Highway Users Alliance
AI Asphalt Institute
AISI American Iron and Steel Institute
ALAR Appalachian Local Access Roads
ALF Accelerated Loading Facility [part of Pavement Testing Facility (PTF)]
AMPO Association of Metropolitan Planning Organizations
ANPRM Advance Notice of Proposed Rulemaking
AOTR Agreement Officer’s Technical Representative
APBP Association of Pedestrian & Bicycle Professionals
APTA American Public Transportation Association
APWA American Public Works Association
AQCR Air Quality Control Region
AQMA Air Quality Maintenance Area
ARC Appalachian Regional Commission
AREA American Railway Engineering Association
ARPA Archeological Resource Protection Act
ARTBA American Road and Transportation Builders Association
ASCE American Society of Civil Engineers
ASLRA American Short Line Railroad Association
ASTM American Society for Testing and Materials, International
ATA American Trucking Associations
ATA Association of Transportation Archaeologists
ATSSA American Traffic Safety Services Administration
AWP Annual Work Plan
BAC Blood Alcohol Concentration (or Content)
BAT Best Available Technology
BCA Bureau of Contract Appeals
BFO Best and Final Offer
BIA Bureau of Indian Affairs
BLM Bureau of Land Management
BMP Best Management Practices
BNIP Bridge Needs and Investment Process
BRRA Bus Regulatory Reform Act
BTS Bureau of Transportation Statistics
CA/T Central Artery/Harbor Tunnel
CAA Clean Air Act
CADRE Critical Automated Data Reporting Elements
CAP Capacity Assurance Plan
CAPE Commercial Accident Prevention and Evaluation
CAS Center for Auto Safety
CBD Central Business District
CBO Congressional Budget Office
CBRA Coastal Barrier Resource Act
CCH Commerce Clearing House
CCRL Cement and Concrete Reference Laboratory
CDL Commercial Driver’s License
CDLIS Commercial Driver’s License Information System
CE Categorical Exclusion
CEA Council of Economic Advisors
CEQ Council on Environmental Quality
CERCLA Comprehensive Environmental Response, Compensation, and Liability Act (“Superfund”)
CERCLIS CERCLA Information System
CERF Civil Engineering Research Foundation
CFO Chief Financial Officer
CFR Code of Federal Regulations
CH Critical Habitat
CHS Citizens for Highway Safety
CMAQ Congestion Mitigation and Air Quality
CMB Concrete Median Barrier
CMV Commercial Motor Vehicle
CMVSA Commercial Motor Vehicle Safety Act of 1986
CO Carbon Monoxide
CO2 Carbon Dioxide
COOP Continuity of Operations Plan
CoP Community of Practice
COTR Contracting Officer’s Technical Representative
CPI Continuous Process Improvement
CPLM Civilian Personnel Law Manual
CR Compliance Review
CRASH Canadians for Responsible and Safe Highways or Citizens for Responsible and Safe Highways
CRP Combined Road Plan
CRREL Cold Region Research and Engineering Laboratory
CRS Congressional Research Service
C-SHRP Canadian Strategic Highway Research Program
CSS Context Sensitive Solutions
CTIP Coordinated Federal Lands Highway Technology Implementation Program
CTPP Census Transportation Planning Package
CTS Correspondence Tracking System
CTTAG Cargo Tank Technical Advisory Group
CUTC Consortium of University Transportation Centers
CVO Commercial Vehicle Operations
CWA Clean Water Act
CY Calendar Year
CZ Clear Zone
CZ Coastal Zone
CZM Coastal Zone Management
DA Division Administrator
DBE Disadvantaged Business Enterprise
DEACON Drug Enforcement Assistance and Coordination
DFS Director of Field Services
DHS U.S. Department of Homeland Security
DIAP Drug Interdiction Assistance Program
DLCSC Driver Licensing and Control Subcommittee
DMV Department of Motor Vehicles
DOA U.S. Department of the Army
DOC U.S. Department of Commerce
DOD U.S. Department of Defense
DOE U.S. Department of Energy
DOI U.S. Department of the Interior
DOJ U.S. Department of Justice
DOL U.S. Department of Labor
DOT U.S. Department of Transportation
DP Demonstration Projects
DSI Detailed Site Investigation
DVMT Daily Vehicle Miles Traveled
EA Environmental Assessment or Enterprise Architecture
EA/FONSI Environmental Assessment/Finding of No Significant Impact
EAJA Equal Access to Justice Act
EAP Employee Assistance Program
ECS Emergency Communications System
EDA Economic Development Administration
EHS Extremely Hazardous Substance
EHTR Emergency Highway Traffic Regulation
EIS Environmental Impact Statement
EJ Environmental Justice
EO Executive Order
EP Experimental Project(s)
EPA Environmental Protection Agency
ER Emergency Relief
ESA Endangered Species Act
FA Federal-aid
FAA Federal Aviation Administration
FACA Federal Advisory Committee Act
FAI Federal-aid Interstate
FAP Federal-aid primary
FAPG Federal-aid Policy Guide
FAR Federal Acquisition Regulations
FARS Fatal Accident Reporting System
FAS Federal-aid secondary
FAU Federal-aid urban
FAUS Federal-aid urban system
FCC Federal Communications Commission
FEMA Federal Emergency Management Agency
FH Forest Highway
FHA Federal Housing Administration
FHBM Flood Hazard Boundary Map
FHWA Federal Highway Administration
FIA Federal Insurance Administration
FICCDC Federal Interagency Coordinating Committee on Digital Cartography
FIF Flood Insurance Fund
FIFRA Federal Insecticide, Fungicide, and Rodenticide Act
FIP Federal Implementation Plan
FIRM Flood Insurance Rate Map
FMCSA Federal Motor Carrier Safety Administration
FMCSR Federal Motor Carrier Safety Regulations
FMIS Federal Management Information System
FMSR Federal Merit System Reporter
FMV Fair Market Value
FMVECP Federal Motor Vehicle Emission Control Program
FMVSS Federal Motor Vehicle Safety Standards
FOIA Freedom of Information Act
FOIL Federal Outdoor Impact Laboratory
FOT Field Operational Test
FPPA Farmland Protection Policy Act
FR Federal Register
FRA Federal Railroad Administration
FSA Flexible Spending Account
F-SHRP Future Strategic Highway Research Program
FSP Field Sampling Plan
FSS Federal Specifications and Standards
FSupp Federal Supplement
FTA Federal Transit Administration
FTCA Federal Tort Claims Act
FTE Full-time Equivalent
FTP Federal Test Procedure
FTR Federal Travel Regulations
FWCA Fish and Wildlife Coordination Act
FWPCA Federal Water Pollution Control Act
FWS Fish and Wildlife Service
FY Fiscal Year
GAO General Accountability Office
GCC Global Climate Change
GIS Geographic Information System
GLP Good Laboratory Practice
GOE General Operating Expense
GPS Global Positioning System
GRIS Geographical Roadway Information System
GRR Great River Road
GSA General Services Administration
GVWR Gross Vehicle Weight Rating
GWPS Groundwater Protection Standard
H/WSTAG Hazardous Waste and Substance Technical Advisory Group
HABS Historic American Building Survey
HAD Office of the Associate Administrator for Administration
HAZMAT Hazardous Materials
HBCU Historically Black Colleges and Universities
HBRRP Highway Bridge Replacement & Rehabilitation Program
HCC Office of the Chief Counsel
HCM Office of the Associate Administrator for Corporate Management
HCR Office of the Associate Administrator for Civil Rights
HCS Highway Capacity Software or Hazard Communication Standards
HEP Office of the Associate Administrator for Planning, Environment and Realty
HERS Highway Economic Requirements System
HETP Highway Engineer Trainee Program
HF High Frequency
HFCC Human Factor Coordinating Committee
HfL Highways for Life
HFL Office of the Associate Administrator for Federal Lands Highway
HFO Highway Field Operations
HHS U.S. Department of Health and Human Services
HIF Office of the Associate Administrator for Infrastructure
HIN Office of the Director of Innovative Program Delivery
HMAC Hazardous Materials Advisory Council
HMIS Hazardous Materials Information System
HMPM Hazardous Materials Program Manager
HMR Hazardous Materials Regulations
HOA Office of the Federal Highway Administrator
HOP Office of the Associate Administrator for Operations
HOV High Occupancy Vehicle
HPA Office of the Associate Administrator for Public Affairs
HPD Office of the Associate Administrator for Professional and Corporate Development
HPL Office of the Associate Administrator for Policy and Governmental Affairs
HPMS Highway Performance Monitoring System
HPNPA High Priority National Program Area
HPTR Highway Planning Technical Reports
HRT Office of the Associate Administrator for Research, Development, and Technology
HSA Office of the Associate Administrator for Safety
HSIP Highway Safety Improvement Program
HSIRS Highway Statistics Information Retrieval System
HSIS Highway Safety Information System
HSM Highway Safety Manual
H-T&I House – Transportation and Infrastructure Committee
HTF Highway Trust Fund
HUD U.S. Department of Housing and Urban Development
HUF Highway Users Federation
HUFSAM Highway Users Federation for Safety and Mobility
HVUT Heavy Vehicle User Tax
HW Hazardous Waste
HWM Hazardous Waste Management
HWTC Hazardous Waste Treatment Council
IACET International Association of Continuing Education & Training
IACP International Association of Chiefs of Police
IADB Inter-American Development Bank
IANA Intermodal Association of North America
IBT International Brotherhood of Teamsters
IBTTA International Bridge , Tunnel, and Turnpike Association
ICC Intercounty Connector
IESNA Illuminating Engineering Society of North America
IHSDM Interactive Highway Safety Design Model
IIHS Insurance Institute for Highway Safety
I/M Inspection and Maintenance
IMIS Integrated Motorist Information System
IPCC Intergovernmental Panel on Climate Change
IPWF International Public Works Federation
IRF International Road Federation
IRIS Integrated Risk Information System (U.S. EPA)
IRM Information Resource Management
IRS Internal Revenue Service
IRWA International Right-of-Way Association
IS Interstate System
ISA Initial Site Assessment
ISTEA Intermodal Surface Transportation Efficiency Act of 1991
ITE Institute of Transportation Engineers
ITS Intelligent Transportation System
IVHSA Intelligent Vehicle-Highway Systems of America
IVSA Intelligent Vehicle Society of America
KFACTOR Percentage of Daily VMT in Peak Hour
KSA Knowledge, Skills and Abilities
LAN Local Area Network
LAST Lakewood Administrative Services Team
LCV Longer Combination Vehicles
LOS Level of Service or Length of Service
LPA Local Public Agency
LSR Local Streets and Roads
LTAP Local Technical Assistance Program
LTPP Long Term Pavement Performance
LTS Legislative Tracking System
LUST Leaking Underground Storage Tank
MADD Mothers Against Drunk Driving
MAGLEV Magnetic Levitation
MARAD Maritime Administration
MBE Minority Business Enterprise
MCA Motor Carrier Act
MCSA Motor Carrier Safety Act
MCSAP Motor Carrier Safety Assistance Program
MFRR Minimum Financial Responsibility Regulations
MIDC Mortgage Interest Differential Computation
MOA Memorandum of Agreement
MOU Memorandum of Understanding
MPG Miles Per Gallon
MPH Miles Per Hour
MPO Metropolitan Planning Organization
MSA Metropolitan Statistical Area
MSPB Merit System Protection Board
MSW Municipal Solid Waste
MTMC Military Traffic Management Command
MUTCD Manual on Uniform Traffic Control Devices
MVA Motor Vehicle Administration
MVMA Motor Vehicle Manufacturers’ Association
MVMT Million Vehicle Miles of Travel
MWAA Metropolitan Washington Airports Authority
NAAQS National Ambient Air Quality Standards
NAC Noise Abatement Criteria
NACE National Association of County Engineers
NACo National Association of Counties
NADO National Association of Development Organizations
NAPA National Asphalt Pavement Association
NARA National Archives and Records Administration
NARC National Association of Regional Councils
NBI National Bridge Inventory
NBIS National Bridge Inspection Standards
NCAC National Crash Analysis Center
NCHRP National Cooperative Highway Research Program
NCP National Contingency Plan
NCS National Communications System
NCSHPO National Conference of State Historic Preservation Officers
NDER National Defense Executive Reserve
NDTA National Defense Transportation Association
NEPA National Environmental Policy Act
NESHAP National Emission Standard for Hazard Air Pollutants
NETS Network of Employers for Traffic Safety
NFIP National Flood Insurance Program
NHI National Highway Institute
NHPA National Historic Preservation Act
NHS National Highway System
NHTSA National Highway Traffic Safety Administration
NIOSH National Institute of Occupational Safety and Health
NITL National Industrial Transportation League
NMCAC National Motor Carrier Advisory Committee
NMFS National Marine Fisheries Service
NN National Network
NOAA National Oceanic and Atmospheric Administration
NPL National Priorities List
NPRM Notice of Proposed Rulemaking
NPS Nonpoint Source or National Park Service
NPTS National Personal Transportation Study
NRC National Response Center or National Research Council
NRECA National Rural Electric Cooperative Association
NRHP National Register of Historic Places
NSA National Stone Association
NSBYP National Scenic Byways Program
NSCI National System Condition Index
NSEP National Security Emergency Preparedness
NSPE National Society of Professional Engineers
NTIS National Technical Information Service
NTP National Toxicology Program or National Transportation Policy
NTW National Transportation Week
OAAA Outdoor Advertising Association of America
OAC Office of Outdoor Advertising Control
OAS Organization of American States
OECD Organization for Economic Cooperation and Development
OFCCP Office of Federal Contract Compliance Programs
OIC Officer in Charge
OIG Office of the Inspector General
OJT On-the-Job Training
OLI Operation Lifesaver, Inc.
OMB Office of Management and Budget
OPA Other Principal Arterial
OPM Office of Personnel Management
OSHA Occupational Safety and Health Administration
OST Office of the Secretary of Transportation (S-1)
  Office of the Deputy Secretary of Transportation (S-2)
  Office of the Under Secretary for Policy (S-3)
  Executive Secretariat (S-10)
  Departmental Office of Civil Rights (S-30)
  Office of Small and Disadvantaged Business Utilization (S-40)
  Office of the Chief Information Officer (S-80)
  Office of Public Affairs (A)
  Office of the Assistant Secretary for Budget and Programs/Chief
  Information Officer (B)
  Office of the General Counsel (C)
  Office of the Assistant Secretary for Governmental Affairs (I)
  Office of the Inspector General (J)
  Office of the Assistant Secretary for Administration (M)
  Office of the Assistant Secretary of Policy (P)
  Office of the Assistant Secretary for Aviation and
  International Affairs (X)
PAC Presidential Advisory Committee or Political Action Committee
PAHC Pan American Highway Congress
PBCAT Pedestrian & Bicycle Crash Analysis Tools
PBIC Pedestrian & Bicycle Information Center
PCA Portland Cement Association
PCB Portland Concrete Barrier
PCBs Polychlorinated Biphenyls
PCP Private Carriers of Passengers
PDP Professional Development Program
PE Preliminary Engineering
PEC Permanent Executive Committee
PFCRA Program Fraud Civil Remedies Act
PI Periodic Inspection
PIARC Permanent International Association of Road Congresses
PIH Pan American Institute of Highways
PIL Policy Interpretation Library
PL Public Law
PLH Public Lands Highway
PMG Pavement Management Group
PMRS Personnel Management Recognition System
PMS Pavement Management System or Personnel Management System
POV Privately Owned Vehicle
PRP Potentially Responsible Party
PS&E Plans, Specifications, and Estimates
PSI Preliminary Site Investigation
PTDIA Professional Truck Drivers Institute of America
PTF Pavement Testing Facility
PTSA Property Transaction Site Assessment
QA Quality Assurance
QAPP Quality Assurance Project Plan
QC Quality Control
QRS Quick Response System
R&D Research and Development
R&T Research and Technology
RAC Response Action Contractor or Research Advisory Committee (AASHTO)
RAP Remedial Action Plan or Relocation Assistance Program
RC Resource Center
RCA Record of Coordination and Approval
RCRA Resource, Conservation and Recovery Act
REA Rural Electrification Administration
RFP Request for Proposal
RHP Replacement Housing Payment
RI/FS Remedial Investigation/Feasibility Study
RIN Regulatory Information Number
RITA Research and Innovative Technology Administration
RMCL Recommended Maximum Contaminant Level
ROADS Recruitment Online Application System
ROD Record of Decision
ROW Right-of-Way
RPI Railway Progress Institute
RRL Regulation Reform Legislation
RTAG Radioactive Technical Advisory Group
RTOR Right-Turn-On-Red
SAC Structures Advisory Council
SAE Society of Automotive Engineers
SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act:  A Legacy for Users
SAP Sampling and Analysis Plan
SARA Superfund Amendments and Reauthorization Act
SAS Statistical Analysis System
SBA Small Business Administration
SBIR Small Business Innovation Research
SCOE Standing Committee on Environment (AASHTO)
SCOH Standing Committee on Highways (AASHTO)
SCOP Standing Committee on Planning (AASHTO)
SCOR Standing Committee on Research (AASHTO)
SCS Soil Conservation Service
SD State Director
SEP State Enforcement Plan
SES Senior Executive Service
SHA State Highway Agency
SHPO State Historic Preservation Officer (or Office)
SHRP Strategic Highway Research Program
SHVs Specialized Hauling Vehicles
SIC Standard Industrial Classification
SIP State Implementation Plan
SITE Site Impact Traffic Evaluation
SITE Superfund Innovative Technology Evaluation
SOV Single Occupant Vehicle
SOW Statement of Work
SPF Simplified Project Forecasting
SPR State Planning and Research
SR State Route
SREA Society of Real Estate Appraisers
SS Safety Specialist
STAA Surface Transportation Assistance Act
STARC State Area Commanders
STIP Statewide Transportation Improvement Program
STURAA Surface Transportation and Uniform Relocation Assistance Act
TA Technical Advisory
TAC Technical Advisory Committee
TAG Technical Advisory Group
TAM Transportation Asset Management
TAR Transportation Acquisition Regulation
TAT Technical Assistance Team
TCD Traffic Control Device
TCM Transportation Control Measure
TCP Traffic Control Plan
TCSP Transportation & Community System Preservation
TEA-21 Transportation Equity Act for the 21st Century
TIFIA Transportation Infrastructure Finance and Innovation Act
TIP Transportation Improvement Program
TMA Transportation Management Association
TMC Travel Management Center
TMDL Total Maximum Daily Load
TMIP Travel Model Improvement Program
TMV Toxicity, Mobility or Volume
TPF Transportation Pooled Fund
TPQ Threshold Planning Quality
TQM Total Quality Management
TRB Transportation Research Board
TRIP The Road Information Program
TRRL Transportation Road Research Laboratory ( United Kingdom )
TS&W Truck Size and Weight
TSA Transportation Security Administration
TSCA Toxic Substances Control Act
TSI Transportation Safety Institute
TSM Transportation System Management
TSP Telecommunications Service Priority (System)
TSP Thrift Savings Plan
TSP Transportation Safety Planning
TST Technical Services Team
TTAP Tribal Technical Assistance Program
TTI Texas Transportation Institute
TTMA Truck Trailer Manufacturers Association
TTSA Tandem Truck Safety Act
TVA Tennessee Valley Authority
TWS Truck Weight Study
UGPTI Upper Great Plains Transportation Institute
ULCC Utility Location and Coordination Council
UMTRI University of Michigan Transportation Research Institute
UPWP Unified Planning Work Program
URAA Uniform Relocation Assistance Act
USACOE U.S. Army Corps of Engineers
USC United States Code
USCA United States Code Annotated
USCM U.S. Conference of Mayors
USDA U.S. Department of Agriculture
USFS U.S. Forest Service
USGS U.S. Geological Survey
USPS U.S. Postal Service
UST Underground Storage Tank
UTC University Transportation Center
UTPP Urban Transportation Planning Package
UTPS Urban Transportation Planning System
UVC Uniform Vehicle Code
VA U.S. Department of Veterans Affairs
VE Value Engineering
VHT Vehicle Hours of Travel
VMT Vehicle Miles Traveled or Vehicle Miles of Travel
VPH Vehicles Per Hour
VRM Visual Resource Management
VSW Vehicle Size and Weight
WBE Women’s Business Enterprise
WIPP Waste Isolation Pilot Program
WMATA Washington Metropolitan Area Transit Authority


Alabama ALDOT
Alaska DOT & PF
Arizona ADOT
Arkansas AHTD
California Caltrans
Colorado CDOT
Connecticut ConnDOT
Delaware DelDOT
Florida FDOT
Georgia GDOT
Hawaii DOT
Idaho ITD
Illinois IDOT
Indiana INDOT
Iowa IowaDOT
Kansas KDOT
Kentucky KYTC
Louisiana DOTD
Maine MaineDOT
Maryland SHA
Massachusetts MassHighway
Michigan MDOT
Minnesota Mn/DOT
Mississippi MDOT
Missouri MoDOT
Montana MDOT
Nebraska NDOR
Nevada NDOT
New Hampshire NHDOT
New Jersey NJDOT
New Mexico NMDOT
North Carolina NCDOT
North Dakota NDDOT
Oklahoma ODOT
Oregon ODOT
Pennsylvania PennDOT
Puerto Rico DTOP
Rhode Island RIDOT
South Carolina SCDOT
South Dakota SDDOT
Tennessee TDOT
Texas TxDOT
Vermont VTrans
Virginia VDOT
Washington WSDOT
West Virginia WVDOT
Wisconsin WisDOT
Wyoming WYDOT
Previous: Appendix A - General Editorial Rules Next: Appendix C - External and Internal Forms of Address

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